Re: MUSB Host problems

[Gary Thomas <gary@mlbassoc.com>]

Pandita, Vikram wrote:
> 
>> -----Original Message-----
>> From: linux-omap-owner@vger.kernel.org [mailto:linux-omap-owner@vger.kernel.org] On Behalf Of Gary
>> Thomas
>> Sent: Tuesday, June 09, 2009 12:46 PM
>> To: linux-omap@vger.kernel.org
>> Subject: MUSB Host problems
>>
>> I'm trying to get MUSB Host working on my 3530 platform (very
> 
> Based on your description, its not MUSB but the USBHOST EHCI block that you want to get working.

Sorry, mistaken terminology.  Yes, I'm trying to get the host ECHI working.

>> similar to the Beagle).  When I startup, I get this message:
>>  Clock usbhost_48m_fck didn't enable in 100000 tries
> 
> This is bad

Why?  What does it mean?  How do I fix it?

>> What does this mean?  How do I fix it?
>>
>> Currently, the USB subsystem finds the various hubs (ports 0-2).
>> The OTG port (0) works great.  When I plug in a device to USB-1,
> 
> Is this a full speed device? 
> 
>> it sees it, but immediately gives up :-(
>>    ehci-omap ehci-omap.0: GetStatus port 1 status 001803 POWER sig=j CSC CONNECT
>>    hub 1-0:1.0: port 1: status 0501 change 0001
>>    hub 1-0:1.0: state 7 ports 3 chg 0002 evt 0000
>>    hub 1-0:1.0: port 1, status 0501, change 0000, 480 Mb/s
>>    ehci-omap ehci-omap.0: port 1 full speed --> companion
> 
> Looks like your device is getting recognized as a full speed.
> So EHCI cannot handle it.

Odd, this is a high speed device (USB 2.0).  I also tried a 2.0 hub, same result.
What could confuse it like this?

> 
> You need to have OHCI driver built in which is not present in linux-omap code base.

Do, how does one use an arbitrary device on the EHCI port?  Must I use a 2.0 hub?

>>    ehci-omap ehci-omap.0: GetStatus port 1 status 003801 POWER OWNER sig=j CONNECT
>>    hub 1-0:1.0: port 1 not reset yet, waiting 50ms
>>    ehci-omap ehci-omap.0: GetStatus port 1 status 003002 POWER OWNER sig=se0 CSC
>>    hub 1-0:1.0: unable to enumerate USB device on port 1
>>    hub 1-0:1.0: state 7 ports 3 chg 0000 evt 0002
>>    hub 1-0:1.0: hub_suspend
>> Then it's dead.  Any ideas?

Note: this is unproven hardware, I'm mostly looking for ideas on
how to troubleshoot the problems.

Thanks

-- 
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Gary Thomas                 |  Consulting for the
MLB Associates              |    Embedded world
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